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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Animals which have many estrous periods per year (ex: cow - sow)
polyestrous
Grading choice
Hormones from both the fetus and the mom.
Follical Stimulating in females
2. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co
effects of BST
cow ovulation
behavioral signs of estrus
~1 month
3. 30-38 hours after estrus cycle begins
urethra
sow ovulation
Dairy calves are removed from cow at birth to...
penis sizes vs delivering methods
4. 114 days
colostrum
testis (gonads)
sow gestation
penis sizes vs delivering methods
5. Contains and regulates the temp of the testes for sperm production
feeding a high producing dairy cow
pelvis
dry matter and water
scrotum
6. 4-6 days
Holstein Cow
kidney stones also called ________ ___________ can develop in the sigmoid flexure
eminal vesicles
mare estrus
7. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
feeding a high producing dairy cow
scrotum
Sperm growth rate
pelvis
8. Way to know everything is alright with the breeding male
oviducts
feeding a high producing dairy cow
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
purpose of Breeding Soundness Exam (BSE) for males
9. Why does estrus happen before ovulation?
Where livelihood is in agriculture
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
prostaglandin
why does the cow need fat deposits during pregnancy?
10. 16-20 hours
visual evaluation (BSE)
cow estrus
testis (gonads)
dartos muscle
11. Provide nourishment for the developing sperm
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
cremaster muscle
sertoli cells
6-8 weeks
12. Failure to have one testis (gonad) to descend
functions of progestrone
monorchid
accessory sex glands
spermatogenesis
13. (male) pushes the testes outward toward the legs for a cool-down off of the body
sertoli cells
Jersey Cow
mastitis
cremaster muscle
14. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
vulva
6-8 weeks
cow gestation
accessory sex glands
15. Sperm production
semen evaluation (BSE)
libido test (BSE)
spermatogenesis
prostate gland
16. FEED
vagina
Hormones from both the fetus and the mom.
Mares
#1 cost in production
17. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge
epididymis: definition - 3 parts - 4 functions
behavioral signs of estrus
monorchid
1. more cost effective - 2. powdered milk is in excess production
18. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
estrous
butterfat
4 major reasons for culling dairy cows
van deferens
19. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)
Hormones from both the fetus and the mom.
cremaster muscle
seasonally polyestrous
cow ovulation
20. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
van deferens
1. more cost effective - 2. powdered milk is in excess production
castration
leydid or interstitial cells
21. 1. brain function - 2. blood flow - 3. willing female
Hormones from both the fetus and the mom.
hormones
what has to happen for males for copulation to occur
testis (gonads)
22. Knife-loose ~1wk of growth. band-loose ~2wks of growth.
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
Size of cow in relation to the amount of milk produced
van deferens
growth lost from castration methods (knife & band)
23. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
Dairy calves are removed from cow at birth to...
Reasons for gestation length being affected
dartos muscle
24. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
hormones
dartos muscle
cremaster muscle
organs used in spermatogenesis
25. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
Dairy Cattle milking schedule
seminiferous tubules
things to check for in a breeding soundness exam (BSE)
Mares
26. Luteolysis happens because of the ____________ hormone
Dairy calves are removed from cow at birth to...
cow estrus
prostaglandin
ewe gestation
27. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
Lutinizing Hormone in males
scrotal circumference (BSE)
mare estrus
elastrator
28. Not under a timeline - cow can not be sold as steak
Jersey Cow
Grading choice
Lutinizing Hormone in females
Reasons for gestation length being affected
29. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.
Culls bulls earlier (2 reasons)
cremaster muscle
burdizzo
humans: stress level vs sperm
30. Important 'landmark' during palpation
cervix
retractor muscles
monestrous
mastitis
31. Birthing process (termination of gestation)
rectal palpation (BSE)
Parturition
Dairy Cattle Lactation (standard)
#1 cost in production
32. (FSH) causes egg to mature in females
Follical Stimulating in females
butterfat
elastrator
stag
33. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
epididymis: definition - 3 parts - 4 functions
rectal palpation (BSE)
testis (gonads)
burdizzo
34. The more stressed out the male is - the less sperm he is going to produce
sow estrus cycle
sow gestation
behavioral signs of estrus
humans: stress level vs sperm
35. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
age and castration
Jersey Cow
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
mare ovulation
36. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
Follical Stimulating in males
prostaglandin
effects of estrogen
stag
37. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
cremaster muscle
epididymis: definition - 3 parts - 4 functions
butterfat
burdizzo
38. 283 days
dairy cattle pregnancy check
cow gestation
feeding a high producing dairy cow
vagina
39. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
Holstein Cow
sow estrus
leydid or interstitial cells
Reasons for gestation length being affected
40. Parturition is controlled by...
feeding a high producing dairy cow
monestrous
Hormones from both the fetus and the mom.
cremaster muscle
41. Check feet and legs - look for masculine traits in build such as crest and muscling
Size of cow in relation to the amount of milk produced
Bull's fibro-elastic penis
Parturition
visual evaluation (BSE)
42. 30-38 hours after estrus cycle begins
4 major reasons for culling dairy cows
Brown Swiss Cow
sow ovulation
Where livelihood is in agriculture
43. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
Follical Stimulating in females
age and castration
Lutinizing Hormone in males
dry matter and water
44. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.
Brown Swiss Cow
eminal vesicles
sperm cell
colostrum
45. What makes the milk flow through the mammary glands?
Blood
#1 cost in production
Reasons for gestation length being affected
sow estrus cycle
46. (LH) stimulates the Leydig cells to produce testosterone
Lutinizing Hormone in males
hypothalamus and pituitary gland
polyestrous
estrous
47. 1. brain function - 2. blood flow - 3. willing female
reasons for castration
dartos muscle
what has to happen for males for copulation to occur
Culls bulls earlier (2 reasons)
48. Can survive ~7 days in cow. vast majority <48 hours
uterus
monestrous
effects of estrogen
Sperm survival specs
49. Larger the cow - more milk is produced; smaller the cow - less milk is produced
Size of cow in relation to the amount of milk produced
prostate gland
Sperm growth rate
4 major reasons for culling dairy cows
50. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
Dairy Cattle Gestation
cervix
sow gestation
prostate gland